Reflector-attaching structure for lamps



March 3, 1931. w E. KRUEGER REFLECTOR ATTACHING STRUCTURE FOR LAMPS Filed Oct. 30, 1929 Patented Mar, 3, 1931 ITED STATES- PA-TENT oer-ice WILLIAM KRUEGER, ofsouri: MILWAUKEE, Wisconsin, ASSIGNORLTQLINE MA TERIAL COMPANY, OF sou'rn MILWAUKEE, WISCONSIN, A-COBIORATION or DELA- j WARE ItEFLECToR- ATTACHING, Stamens iron LAMPS Application filed October 30, 1929; Serial no. 403,414.,

' This invention relates toreflector'attach- .ing structures for lamps.

Ob'ects of this invention are to provide a novel form of reflector attaching structure for lamps which is so constructed that the re fiector may be very readily attached ordetached from the body port-ion, which is provided withineans for preventing inadvertent detachment of the reflector, and whichrequires no tools whatsoever for either attachingor detachingthe reflector."

Further objects are to provide a reflector attaching structure which is equipped with means forpreve'ntingrattling of the reflector even when the device is f subjected to severe jars, whi'chsomewhat yieldingly'holds the reflector initscorrect position centrally of the body portion of the reflector receiving structure, and which positively locks the reflecto'r to the bodyportion so that it cannot be detached without'firs'tdetaching a latching member.

Further objects are to provide a reflector: D

Figure 1, it will be seen that the downwardly attaching structurewhichis so made that threads are provided in the bodyportion which receives the reflector and a novel spring construction is provided for the reflector in the place of cooperating threads, such spring or yielding construction not only cooperating with the threaded portion ofthe body of the device, j but also preventing rattling of the reflector and serving a still further purpose of providing a very simple form of lock or latching means to prevent inadvertent detachment or unscrewing of the reflector. t p

Further objects'are to provide a construction which is so made that an unskilled laborer may easily Idetach or attachareflector, in which adequate protection isaflorded all live parts of the lamp receiving body por tion, in which it is impossible to screw the reflector beyond a certain predetermined point and which therefore permits the use of a metal reflector with absolute assurance that no possible short-circuiting or other harmful electrical, connections can be. inadvertently made during the assembly or removal of the reflector.

' 2 2 of Figure 1.

in the accompanying drawings, in which Figure'l is a side elevation, partly in section, of thelap'paratusg Figure 2 is a sectional'view on the line Figure 3 is a fragmentary sectional detail showing a modified formofthe invention; Referring to the drawings, it will be seen that a body portionl has been provided, and that this body portion is'carried in any suitable-manner, as by means of, the canopy 2.

The body portion may bemade of porcelain or other material as desired, and is provided with a down wardly' pro ecting cylindrical flange or member 3,;asshown in Figure 1.

The body portion is alsoprovided with any suitable. means for receiving a lamp, not

ssh own zFor example, it'fln'iay' be'provided with yielding contact strips or fingers 4 be tween Which the prongs of the lamp may be inserted The contact strips 4 are connected to wire receiving members or terminals 5.

In the 'forni of the invention vshown in projecting. portion of the body 1- carries a sleeve 6 which maybe formed of metal and which constitutes an extension of the downwardly projecting flange 3. s This metal sleeve'may be held in place in any suitable manner, as by means of the screws 7, which pass through the flangei and arethreaded into the extension or sleeve 6. This sleeve 6, it s to be noted, isinternally threaded, as indicated at 8, and, it is preferable to form these suitable material. The spring 11 surrounds the shank 10, as shown most clearly in Figure 2, and it is provided with an inwardly looped or projecting portion 12 and with a looped or: rounded end 13', which also projects inwardly of the outline of the shank 10; Notches are provided for thereception of the inwardly projecting looped portions 12 and 13 of the grooves 8 formed in the downwardly 6Xl361l(l-" spring 11. One end of the spring passes inwardly or" the shank through an opening 14, and is provided with an outwardly proj ecting finger or latching tongue 15, as shown most clearly in Figure 2. This outwardly projecting latching member or tongue eX- tends through an opening formedin the shank and is thus guided by the shank,

The pin or tongue tends to move out wardly due to the resiliency of the spring, but

curin 1e "L1 i a l ti initia ositioning oi the refle tor, it merely rides within the threads or ing sleeve or flange. ltis to be noted thattlie spring 11 does not extend around the shank in a single plane, but due to the openings whichreceive the projecting portions, the spring in reality is spirally wound or P0311 tioned about the-shank. The-spring 11 is not truly circular, but is so shaped that the intermediate portions thereof between each end and the-inwardly projecting part 12 tend to bow. outwardly and cause a binding action between the spring and the sleeve 7. This construction prevents rattling of the reflector and'at thesame time aidsin main-, taining a central position foirthereflecto-r with respect to the body portion, even when the sleeve 6 is sli htly largerthan the shank or cylindrical portion 10 of the reflector.

The assembling of this spring is very easy to follow, for, trom'a reference to Fi ure 2,

7 it will be seen that the lockingor latching end:

of the spring may be inserted through the opening .14, and thereafter the looking. or latchin projection or tongue 15 may. be passed outwardly thronghits corresponding. opening in the shank 10. It is then a simple.

matter to slip the projecting portions 12 and 13 into their appropriate no ches or openings in the shank 10, so that the spring occupies the position shown at Figures land In using the apparatus, the reflector is vmerely screwed into place, the spring l-itting within the threads 8 and traveling along such V the body portion;

In order to permit the removal of the relector when it is desired, means are provided for unseating the tongue or linger 15 of the 'spr ii'ig. Thisimeans may consist of a small plunger 17 which is carried at the endof a leaf spring'l8 secured to the body portion as shown in Figure 2. The plunger 17 is positioned within the hole or notch 16 and is preterably provided with a slightly enlarged inner end, which seats on acorresponding shoulder oi the hole 16, although, of course,

this, construction could be varied without departing from the spirit of this invention. As a matter of fact, any other unseating means for pressing the tongue 15 inwardly could-be employed. It is, also, of course,

This could readily be accomplished, as shown,

in the modified form of the invention illustrated in Figure 3, by forming the flange 3' of the body portion 1 of greater length than that'shown in Figure 1, and by forming the internal threads .8 directly in this flange. Theoperation of the apparatus is identically the same as that previously described,

t ,is to be understood that although the spring has been shown ascarried by the reflector and as spirallypositioned on the shank of the reflector. that-the threads could be formedin the reflector and the spring structure could be carried by the body portion, provided, of coursc,;that the positive interlocking of the spring with the threads is obtained, and

provided also auras latching is secured by a projecting and yi lding tongue or latching member formed on the spring.

, It will be seen that a very simple reflector attachingstructure'h'as been provided by'this inventionwh'ich is so made'thatan easily formed and assembled sprin carried by the reflector, cooperates with a threaded portion of the body which receives the reflector.

' Although this invention has been described in considerable detai 1, it is to be understood that such description is intended as illustrathe. rather than limiting, as the invention may as claimed.

I claim:

1. A lamp receiving structure comprising two members, one of said members being a bodyv portion and the other of'said members being a reflector, each of said members having a cylindrical portion, one of said cylindrical be variously embodied and is tobeintm'preled portions having threads formed therein. and

the other of said cylindrical portions havin a spirally arranged spring adapted to en -11 5 said threads; P

:2. A lamp receiving structure compi'isiin two members, one of said members being body'portion and the other of said members being a reflector, each of saidmembers having a cylindricalportion, one of said cylindrical portionshaving threads and having a hole formed therein, and the ,other of said cylindrical portions having a spirally arranged spring adapted to engage said threads,,said spring having a projecting portion adapted to enter said hole to'prevent unscrewing of said members.

i 3. A lamp receiving structure comprising a body portion having a threaded part,-a reflector adapted to be received by saidbody portion, and a resilient" member having a spiral shape carried by said reflector and interlocking with the threads ofsaid body portion. r

4. A lamp receiving structure comprising a body portion having a threaded part, a reflector adapted to be receivedby said body portion, and a resllient member havlng a splral shape carried by said reflector 2111(1111- v terlocking with the threads of said'body por tion, said resilient member yieldingly binding against said body portion and said reflector. 5. A lamp receiving structure comprising a body portion p'rovidedavith a cylindrical flange having threads formed therein, a re flector having'a cylindrical portionada'pted to be received by said flange, a spirally arranged spring carried bythe cylindrical portion of said reflector and cooperating with said threads, said spring having projecting portions and sald reflector llilVlIlg apertures for the reception of said projecting portions to thereby hold said spring inits spiral posiextending flange having threads formed therein, areflector having a CYllIldI'lCfil shanlga spirally arranged spring carried by i the cylindrical shank of said reflector, said cylindrical shank having apertures, and said spring having projecting portions fitting within said apertures, said spring having a pro ecting latching tongue, the flange of said "body portion having a hold adapted to receive saidlatching tongue, and a plunger carried by said body portion and adapted to move said projecting tongue from said hole when said plunger is depressed.

" In testimony whereof, the signatu re of the inventor is aflixed hereto.

' WILLIAM E. KRUEGER.

- tion, said spring binding against said body portion and saidreflectorto preventrattling flange having threads formed therein, areflector having a cylindrical portion adapted to be received by said flange, a spirally ar ranged spring carried by the cylindrical por tion of said reflector and cooperating with said threads, said spring having projecting portions and saidrefiector having apertures for the reception of said projecting portions tothereby holdsaid spring in its spiral position, saidspring tending to assume a-shape other than circular, whereby said spring will bind against said reflector and said body portion.

7'. A lamp receiving structure comprising a body portion having a projecting cylindrical flange provided with threads, a reflector having a cylindrical flange adapted to be received by the flange of said body portion, a spring carriedby said reflector and adapted to fit within said threads, the flange'of said body portion having a hold thereon, and said spring having a, projecting latching tongue adapted to enter said'hole to prevent inadvertent unscrewing of said reflector.

8. A lamp receivingstructure comprising a body portion having a projecting cylindrical flange provided with threads,a reflector having a cylindrical flange adapted to be a 

